// <editor-fold defaultstate="collapsed" desc="GNU GPLv3 Header">
/*
 * File:   AlawDecoder.c
 *
 * Copyright (C) 2013 Robert Antoni Buj Gelonch <rbuj@uoc.edu>
 * Copyright (C) 2013 David Megias Jimenez <dmegias@uoc.edu>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
// </editor-fold>

#include "../AlawDecoder.h"

void AlawDecode(char* compressed, short int* expanded) {
    char segment = ((*compressed) & 0x70) >> 4;
    char quant = (*compressed) & 0x0F;
    if (segment == 0) {
        (*expanded) = quant << 1;
    } else {
        (*expanded) = (0x10 | quant) << segment;
    }
    if (((*compressed) & 0x80) == 0x80) {
        (*expanded) = (*expanded)*(-1);
    }
}

void AlawDecodeTransmission(char* compressed, short int* expanded) {
    char temp = (*compressed) ^ 0x55;
    AlawDecode(&temp, expanded);
}
